Memo: Custom-made is availableTypical propertiesRefractoriness 1650 centigradeRefractoiness under load 1420 centigradeAl2O3 36%-46%SiO2 45%-56%Fe2O3 ≤ 1%Characteristics: Strong refractoriness and corrosion resistance, impervious and not craze, excluding gold and silver elements, more accurate test results.The average serial can be used for 2-3 times, the export serial can be used for 3-5 times